Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Civil 200 Test > Likeley Questions > Flashcards

Likeley Questions Flashcards

1
Q

Name 3 rock properties that influence rock mechanical behaviour

A

Cleavage, hardness, solubility

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Name 4 rock characteristics (describing a rock)

A

Type, age, place, structure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

3 rock types

A

Igneous, sedimentary, metamorphic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Describe 3 occurrences of igneous rock

A

Plutonic - high pressure environment, slow cooling, intrusive plutons. Subvolcanic - transitional between intrusive sills and dykes. Volcanic - low pressure environment, fast cooling, extrusive.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

3 types of igneous rock

A

Magma, volcanic, plutonic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

3 volcanic processes

A

Lava, tephra, pyroclastic flows

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What kind of rocks have the most desirable engineering properties and why

A

Intrusive and chrystallie extrusive rocks, they are strong, stable and little movement of water.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What can influence sedimentary rock characteristics

A

Type of material, transportation mechanism, depositional site

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

5 sedimentary rock groups

A

Clastic, bionic, chemical, volcaniclastic, mixed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Describe the general process of sedimentary rock

A

Weathering (from parent source ruck), erosion and transportation, deposition, accumulation, lithification.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Describe the lithification process

A

Soil into rock. Layers of soil, compaction, cementation, significant increase in strength.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Clastic classification

A

Clast composition, size, shape, sorting

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Describe 3 metamorphic processes

A

Contact (high heat), dynamic ( deformation and pressure), regional (high heat and pressure).

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

How con crustal deformation occur

A

Tectonic movements, plutonic deposits and volcanic activity, charge in loading (gravity effects).

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What can folding be effected by

A

Temperature, pressure, strain rate, rock type

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Why does direction of bedding matter

A

Stability of structures, movement of water, tunnels and underground structures

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

4 planar defects

A

Fractures and joints, cleavage, bedding, lithologic boundaries.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Zonal defects

A

Crushed seam, sheared zone, infill, voids/cavities

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Denudation

A

Process of exposing deposits. Weathering, erosion degradation, transportation - part of the exogenic process

20
Q

Weathering types

A

Mechanical physical, chemical, biological.

21
Q

When classifying rocks what would you write in the main paragraph?

A

Weathering, colour, fabric, rock name.

22
Q

Unweathered

A

Rock mass shows no loss of strength, discolouration or other effects die to weathering. There may be slight discolouration on major rock mass defect surfaces or on clasts.

23
Q

Completely weathered

A

Original rock strength is lost and the rock mass charged to a soil either by chemical decomposition or by physical disintegration.

24
Q

What would you write in the qualifying paragraph

A

Strength, discontinuities, geologic information, characterises the rock mass

25
Q

How could you determine strength (tests)

A

Unconfined compression test, point load test, rebound hammer

26
Q

Discontinuities

A

Describe defects within the rock mass. Orientation, spacing, persistence, roughness, wall strength, aperature, infill, seepage, sets, block size and shape

27
Q

ClassifyING roughness

A

Rough, smooth, slickensided. Stepped, undulating, planar.

28
Q

Soil origins

A

Transported soils, residual soils, organic soils, volcanic soils

29
Q

Transported soils

A

Alluvium ( rivers and streams clay to gravel size), colluvium (mass movement and surface water flow, clay to boulder size), glacial ( ice movement, silt to boulder size), aeolian (wind, silt size and fire sand), volcanic

30
Q

Residual soils

A

Formed by weathering in place. Decomposition (chemical) disintegration (mechanical)

31
Q

Organic soils

A

Formed in place by growth and decay of plants, accumulation of fragments of inorganic skeletons or shells of organisms. Low strength and stiffness.

32
Q

Silts vs. Clays

A

Dilatant behaviour only occurs in silts. Shaking changes distribution of particles.

33
Q

% gravel > % sand

A

Cu greater than 4 CC between 1 and 3

34
Q

% sand > % Gravels

A

Cu greater than 6 and CC between 1 and 3 to be well graded

35
Q

Hydrometer test

A

To determine the grain size distribution, better for fines clays and silts. Based on sedimentation and stokes law. Sampling approach, hydrometer approach,

36
Q

2 tests for attenburg limits.

A

Casagrande apparatus,, liquid limit cone penetrometer.

37
Q

Sand cone test

A

To find the bulk density / unit weight

38
Q

Nuclear densometer

A

Density and water content measurement.

39
Q

Fundamental seepage assumptions

A
  • Flow is laminar,
  • incompressible flow: conservation of mass,
  • soil is saturated,
  • flow is steady state.
    Seepage is the difference in head between points needed for seepage to occur.
40
Q

What effects the coefficient of permability

A

Void size, void continuity, soil particle shape, soil particle roughness, viscosity e density of water. Grain size distribution

41
Q

Lab tests to determine K

A

Constant head test - coarse grained soils. Falling head test- course and five grained soils.

42
Q

Constant head test

A

Head difference is constant.

43
Q

Falling head rest

A

Head difference is changing,

44
Q

Seepage parallel to layers

A

Head loss through each layer is the same, flow rate is split across layers. Hydraulic gradient I same - equivalent characteristics controlled by the most permeable layer.

45
Q

Seepage normal to layers

A

Head loss through each layer varies. Flow rate is the same. Equivalent characteristics controlled by the most impermeable layer

46
Q

Quick condition or piping

A

If upward seepage reduces effective stress, at some point seepage could reduce effective stress to zero or negative. No interparticle forces at this point, erosion will occur.

47
Q

Tests to determine grain size distribution

A

Sieve analysis, hydrometer test

Civil 200 Test (11 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions